HP 6120XG HP ProCurve Series 6120 Blade Switches Access Security Guide - Page 231
To Generate or Erase the Switch's Public/Private Host Key Pair., show ip ssh, write memory
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Note Configuring Secure Shell (SSH) Configuring the Switch for SSH Operation When you generate a host key pair on the switch, the switch places the key pair in flash memory (and not in the running-config file). Also, the switch maintains the key pair across reboots, including power cycles. You should consider this key pair to be "permanent"; that is, avoid re-generating the key pair without a compelling reason. Otherwise, you will have to re-introduce the switch's public key on all management stations you have set up for SSH access to the switch using the earlier pair. Removing (zeroing) the switch's public/private key pair renders the switch unable to engage in SSH operation and automatically disables IP SSH on the switch. (To verify whether SSH is enabled, execute show ip ssh.)However, any active SSH sessions will continue to run, unless explicitly terminated with the CLI 'kill' command. To Generate or Erase the Switch's Public/Private Host Key Pair. Because the host key pair is stored in flash instead of the running-config file, it is not necessary to use write memory to save the key pair. Erasing the key pair automatically disables SSH. Syntax: crypto key generate Installs authentication files for ssh or https server, or for autorun. autorun-key Install RSA key for autorun. See "Configuring Autorun on the Switch" in Appendix A of the Management and Configuration Guide for more information. cert Install RSA key for https certificate. See "Configuring the Switch for SSL Operation" on page 7-7 in this guide for more information. ssh [dsa | rsa] Install host key for ssh server. Specify the key type as DSA or RSA. bits Specify the key size (in bits). See Table 6-2. zeroize Erases the switch's public/private key pair and disables SSH operation. 6-11